Sensors Failing

[NathanJohnson98]

Hi,

I have an automatic Citroen C4 Picasso Exclusive 2014 and I’ve only had the car for a few months since passing my test.

I am having issues with my RPM reaching up to 3000 before changing gear (was 4000 at one point)

These are on dashboard which is showing up when starting my engine:

ABS/EPS
Anti Roll Back
Under inflation
Parking Brake (even though that’s working)

I have got my car booked in with a automatic transmission and gearbox specialist to get a diagnosis of the car and to see if I’m having any issues with that side of things (I hope note )

I would appreciate any advice as I’m stuck and it’s really frustrating me big time.

Kind regards,

Nathan.

[RichardW]

Welcome along.

This is probably a semi automatic - does it have a 'P' position on the gear selector?

It's probably nothing to do with the gear box, my guess is probably an ABS sensor - and this being a MK2 Picasso, it's most likely a broken a wire to a rear sensor.

[NathanJohnson98]

It is semi automatic, mine doesn’t have a P though. It is located behind the steering wheel and it shows:

R N A M

Thanks for the reply.

[PaulC5]

Looks as if you will be better going to a Citroen dealer rather than a gear box specialist which might be a waste of money.

[NathanJohnson98]

Looks as if you will be better going to a Citroen dealer rather than a gear box specialist which might be a waste of money.

Would that be cheaper than going to a specialist do you reckon? They are only going to diagnose my car, but if you’d think I’d be wasting my time then I might consider that. I just don’t know if a dealer would try and rip me off a bit because the specialist I’m going to has a good reputation as I asked my local Facebook group for advice as well

[PaulC5]

If it is a wiring fault to a rear abs sensor then you will need to make sure the specialist knows about Citroen Picasso common faults and has the correct diagnostic equipment which a Citroen dealer will have. If the specialist is not familiar then you may also end up paying a Citroen dealer as well.

[NathanJohnson98]

If it is a wiring fault to a rear abs sensor then you will need to make sure the specialist knows about Citroen Picasso common faults and has the correct diagnostic equipment which a Citroen dealer will have. If the specialist is not familiar then you may also end up paying a Citroen dealer as well.

I understand what you’re saying but I’ve heard of nightmare stories of going to dealers and them being absolutely extortionate. I do have the funds but I’ve just heard horror stories that’s all

[GiveMeABreak]

The same can be said of so called 'specialists' that haven't got a clue. Plenty of examples of people that have wasted money and paying twice....

Your issue will be that the engine ECU has put the vehicle into reduced power mode until the faults are dealt with. If you have the actual fault codes we can provide you with the likely causes. Any issue with a wheel speed sensor will affect all those features and systems you list as they are all related to the data provided by the wheel speed sensors via the ESP ECU.

It won't necessarily be expensive if it's a wheel speed sensor, but at least your dealer will be able to correctly diagnose it and sort it for a fixed price.

[RichardW]

DK Autos in Boston specialise in these and are not massively far from you. The gearbox man may be able to scan it and see what codes are present which will give a pointer.

[NathanJohnson98]

The same can be said of so called 'specialists' that haven't got a clue. Plenty of examples of people that have wasted money and paying twice....

Your issue will be that the engine ECU has put the vehicle into reduced power mode until the faults are dealt with. If you have the actual fault codes we can provide you with the likely causes. Any issue with a wheel speed sensor will affect all those features and systems you list as they are all related to the data provided by the wheel speed sensors via the ESP ECU.

It won't necessarily be expensive if it's a wheel speed sensor, but at least your dealer will be able to correctly diagnose it and sort it for a fixed price.

I have booked my car in to a Citroen dealer, it’s in Nuthall which is near me. Going to carefully drive it to them and they said that they’ll be able to do a diagnostic which is £120 and then will fix anything that needs to be fixing. I’ve got warranty as well with a repair limit of £1000 so I should be all good and contacted them about it, they said to give them the details of the warranty and it should be golden as I have premier coverage.

My mums partner has a bit of understanding about cars as he’s repaired his own, said that it looks like one of my wires are damaged but still best to get it checked at the dealer.

I appreciate everyone’s response and hoping it gets sorted on the Monday (taking my car in on Sunday morning)

[GiveMeABreak]

You warranty should cover the cost of the diagnostic, so check that. They have to do this to confirm the fault and the exact sensor. Some dealers won't charge for the diagnostic if it's a quick confirmation of the fault when having the work done with them. Warranty work requires a diagnosis in order to make a claim under cover to validate the repair requirement, but should cover a basic diagnostic.

Even without warranty, I've rarely ever been charged a diagnostic by my dealer.

[NathanJohnson98]

I phoned them up and they said it’s £120 and I had to book an appointment. It would be nice if they didn’t charge me but I’ve got the funds anyway and my warranty have said they’ll cover everything as well which is nice so I’ve already said to my warranty that I’d like to extend it too.

Thanks for the reply, here’s hoping that they won’t charge me, everyone is saying that it sounds like an easy fix. Just scared me when all my sensors popped up after having my abs sensors replaced.

[PaulC5]

Thanks for the reply, here’s hoping that they won’t charge me, everyone is saying that it sounds like an easy fix. Just scared me when all my sensors popped up after having my abs sensors replaced.

You did not mention you already had the abs sensors replaced - where these parts from Citroen or copy parts, why did you replace them ?

[NathanJohnson98]

I went to a garage to fit them, I didn’t do it myself so I already spent money on that part of things. Everything was fine until I got back home and then poof the sensors mentioned are going off. The garage I went to source their parts from GSF so I would assume they’d know a bit more than what I do myself (that was when I was in proper panic mode) didn’t cost too much anyway and was only about £70 so didn’t want to go through warranty on that. However, now I wish I just went straight to the dealer and that’s a lesson learned on my part.

[PaulC5]

If you kept the old sensors and they were not faulty you might be able to get them put back if it turns out the replacement ones are the problem.